I have a unibody macbook and today it was working fine, then tonight i opened it up it was frozen so after a minute of trying to get it to work with no sucess I held the power button until it turned off. when I tried turning on again the screen stayed white and would not turn on. So i turned it off and held option and the scary part is the osx partition is gone but my window partition is still there Im posting this from the window partition. How could it just randomly dissappear I didnt even use the windows part for the past month.